/**
 * Created by Administrator on 2017-05-18.
 */
var $wrap = $('#uploader'),
// 图片容器
    $queue = $('<ul class="filelist"></ul>')
        .appendTo( $wrap.find('.queueList') ),
// 状态栏，包括进度和控制按钮
    $statusBar = $wrap.find('.statusBar'),
// 文件总体选择信息。
    $info = $statusBar.find('.info'),
// 上传按钮
    $upload = $wrap.find('.uploadBtn'),
// 没选择文件之前的内容。
    $placeHolder = $wrap.find('.placeholder'),
// 总体进度条
    $progress = $statusBar.find('.progress').hide(),
// 添加的文件数量
    fileCount = 0,
// 添加的文件总大小
    fileSize = 0,
// 优化retina, 在retina下这个值是2
    ratio = window.devicePixelRatio || 1,
// 缩略图大小
    thumbnailWidth = 110 * ratio,
    thumbnailHeight = 110 * ratio,
// 可能有pedding, ready, uploading, confirm, done.
    state = 'pedding',
// 所有文件的进度信息，key为file id
    percentages = {},
    supportTransition = (function(){
        var s = document.createElement('p').style,
            r = 'transition' in s ||
                'WebkitTransition' in s ||
                'MozTransition' in s ||
                'msTransition' in s ||
                'OTransition' in s;
        s = null;
        return r;
    })(),
// WebUploader实例
    uploader;
if ( !WebUploader.Uploader.support() ) {
    alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
    throw new Error( 'WebUploader does not support the browser you are using.' );
}
// 实例化
uploader = WebUploader.create({
    pick: {
        id: '#filePicker',
        label: '点击选择图片'
    },
    dnd: '#uploader .queueList',
    paste: document.body,

    accept: {
        title: 'Images',
        extensions: 'gif,jpg,jpeg,bmp,png',
        mimeTypes: 'image/*'
    },

    // swf文件路径
    swf: BASE_URL + '/js/Uploader.swf',
    disableGlobalDnd: true,
    chunked: true,
    // server: 'http://webuploader.duapp.com/server/fileupload.php',
    server:UPLOAD_URL,
    fileNumLimit: ONLY?1:300,
    fileSizeLimit: 300 * 1024 * 1024,    // 200 M
    fileSingleSizeLimit: 1 * 1024 * 1024    // 50 M
});

// 添加“添加文件”的按钮，
uploader.addButton({
    id: '#filePicker2',
    label: '继续添加'
});

// 当有文件添加进来时执行，负责view的创建
function addFile( file ) {
    var $li = $( '<li id="' + file.id + '">' +
                //'<p class="title">' + file.name + '</p>' +
            '<p class="imgWrap"></p>'+
            '<p class="progress"><span></span></p>' +
            '</li>' ),

        $btns = $('<div class="file-panel">' +
            '<span class="cancel">删除</span>' +
            '<span class="rotateRight">向右旋转</span>' +
            '<span class="rotateLeft">向左旋转</span></div>').appendTo( $li ),
        $prgress = $li.find('p.progress span'),
        $wrap = $li.find( 'p.imgWrap' ),
        $info = $('<p class="error"></p>'),

        showError = function( code ) {
            switch( code ) {
                case 'exceed_size':
                    text = '文件大小超出';
                    break;

                case 'interrupt':
                    text = '上传暂停';
                    break;

                default:
                    text = '上传失败，请重试';
                    break;
            }
            $info.text( text ).appendTo( $li );
        };

    if ( file.getStatus() === 'invalid' ) {
        showError( file.statusText );
    } else {
        // @todo lazyload
        $wrap.text( '预览中' );
        uploader.makeThumb( file, function( error, src ) {
            if ( error ) {
                $wrap.text( '不能预览' );
                return;
            }

            var img = $('<img src="'+src+'">');
            $wrap.empty().append( img );
        }, thumbnailWidth, thumbnailHeight );

        percentages[ file.id ] = [ file.size, 0 ];
        file.rotation = 0;
    }

    file.on('statuschange', function( cur, prev ) {
        if ( prev === 'progress' ) {
            $prgress.hide().width(0);
        } else if ( prev === 'queued' ) {
            $li.off( 'mouseenter mouseleave' );
            $btns.remove();
        }

        // 成功
        if ( cur === 'error' || cur === 'invalid' ) {
            console.log( file.statusText );
            showError( file.statusText );
            percentages[ file.id ][ 1 ] = 1;
        } else if ( cur === 'interrupt' ) {
            showError( 'interrupt' );
        } else if ( cur === 'queued' ) {
            percentages[ file.id ][ 1 ] = 0;
        } else if ( cur === 'progress' ) {
            $info.remove();
            $prgress.css('display', 'block');
        } else if ( cur === 'complete' ) {
            $li.append( '<span class="success"></span>' );
        }

        $li.removeClass( 'state-' + prev ).addClass( 'state-' + cur );
    });

    $li.on( 'mouseenter', function() {
        $btns.stop().animate({height: 30});
    });

    $li.on( 'mouseleave', function() {
        $btns.stop().animate({height: 0});
    });

    $btns.on( 'click', 'span', function() {
        var index = $(this).index(),
            deg;

        switch ( index ) {
            case 0:
                uploader.removeFile( file );
                return;

            case 1:
                file.rotation += 90;
                break;

            case 2:
                file.rotation -= 90;
                break;
        }

        if ( supportTransition ) {
            deg = 'rotate(' + file.rotation + 'deg)';
            $wrap.css({
                '-webkit-transform': deg,
                '-mos-transform': deg,
                '-o-transform': deg,
                'transform': deg
            });
        } else {
            $wrap.css( 'filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation='+ (~~((file.rotation/90)%4 + 4)%4) +')');
            // use jquery animate to rotation
            // $({
            //     rotation: rotation
            // }).animate({
            //     rotation: file.rotation
            // }, {
            //     easing: 'linear',
            //     step: function( now ) {
            //         now = now * Math.PI / 180;

            //         var cos = Math.cos( now ),
            //             sin = Math.sin( now );

            //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
            //     }
            // });
        }


    });

    $li.appendTo( $queue );
}

// 负责view的销毁
function removeFile( file ) {
    var $li = $('#'+file.id);

    delete percentages[ file.id ];
    updateTotalProgress();
    $li.off().find('.file-panel').off().end().remove();
}

function updateTotalProgress() {
    var loaded = 0,
        total = 0,
        spans = $progress.children(),
        percent;

    $.each( percentages, function( k, v ) {
        total += v[ 0 ];
        loaded += v[ 0 ] * v[ 1 ];
    } );

    percent = total ? loaded / total : 0;

    spans.eq( 0 ).text( Math.round( percent * 100 ) + '%' );
    spans.eq( 1 ).css( 'width', Math.round( percent * 100 ) + '%' );
    updateStatus();
}

function updateStatus() {
    var text = '', stats;

    if ( state === 'ready' ) {
        text = '选中' + fileCount + '张图片，共' +
            WebUploader.formatSize( fileSize ) + '。';
    } else if ( state === 'confirm' ) {
        stats = uploader.getStats();
        if ( stats.uploadFailNum ) {
            text = '已成功上传' + stats.successNum+ '张照片至XX相册，'+
                stats.uploadFailNum + '张照片上传失败，<a class="retry luck-a-blue" href="#">重新上传</a>失败图片'
        }

    } else {
        stats = uploader.getStats();
        text = '共' + fileCount + '张（' +
            WebUploader.formatSize( fileSize )  +
            '），已上传' + stats.successNum + '张';

        if ( stats.uploadFailNum ) {
            text += '，失败' + stats.uploadFailNum + '张';
        }
    }

    $info.html( text );
}

function setState( val ) {
    var file, stats;

    if ( val === state ) {
        return;
    }

    $upload.removeClass( 'state-' + state );
    $upload.addClass( 'state-' + val );
    state = val;

    switch ( state ) {
        case 'pedding':
            $placeHolder.removeClass( 'element-invisible' );
            $queue.parent().removeClass('filled');
            $queue.hide();
            $statusBar.addClass( 'element-invisible' );
            uploader.refresh();
            break;

        case 'ready':
            $placeHolder.addClass( 'element-invisible' );
            $( '#filePicker2' ).removeClass( 'element-invisible');
            $queue.parent().addClass('filled');
            $queue.show();
            $statusBar.removeClass('element-invisible');
            uploader.refresh();
            break;

        case 'uploading':
            $( '#filePicker2' ).addClass( 'element-invisible' );
            $progress.show();
            $upload.text( '暂停上传' );
            break;

        case 'paused':
            $progress.show();
            $upload.text( '继续上传' );
            break;

        case 'confirm':
            $progress.hide();
            $upload.text( '开始上传' ).addClass( 'disabled' );

            stats = uploader.getStats();
            if ( stats.successNum && !stats.uploadFailNum ) {
                setState( 'finish' );
                return;
            }
            break;
        case 'finish':
            stats = uploader.getStats();
            if ( stats.successNum ) {
                //alert( '上传成功' );


            } else {
                // 没有成功的图片，重设
                state = 'done';
                location.reload();
            }
            break;
    }

    updateStatus();
}

uploader.onUploadProgress = function( file, percentage ) {
    var $li = $('#'+file.id),
        $percent = $li.find('.progress span');

    $percent.css( 'width', percentage * 100 + '%' );
    percentages[ file.id ][ 1 ] = percentage;
    updateTotalProgress();
};

uploader.onFileQueued = function( file ) {
    fileCount++;
    fileSize += file.size;

    if ( fileCount === 1 ) {
        $placeHolder.addClass( 'element-invisible' );
        $statusBar.show();
    }

    addFile( file );
    setState( 'ready' );
    updateTotalProgress();
};

uploader.onFileDequeued = function( file ) {
    fileCount--;
    fileSize -= file.size;

    if ( !fileCount ) {
        setState( 'pedding' );
    }

    removeFile( file );
    updateTotalProgress();

};

//上传成功
uploader.onUploadSuccess=function( file,response ) {
    luck_photo(response);
};

uploader.on( 'all', function( type ) {
    var stats;
    switch( type ) {
        case 'uploadFinished':
            setState( 'confirm' );
            break;

        case 'startUpload':
            setState( 'uploading' );
            break;

        case 'stopUpload':
            setState( 'paused' );
            break;

    }
});

uploader.onError = function( code ) {
    //alert( 'Eroor: ' + code );
    var msg='';
    switch (code){
        case 'Q_EXCEED_NUM_LIMIT':
            msg='请不要超出文件数量';
            break;
        case 'Q_EXCEED_SIZE_LIMIT':
            msg='文件总大小过大';
            break;
        case 'Q_TYPE_DENIED':
            msg='文件类型选择错误';
            break;
    }
    $.messager.alert('提示',msg, 'error');
};

$upload.on('click', function() {
    if ( $(this).hasClass( 'disabled' ) ) {
        return false;
    }

    if ( state === 'ready' ) {
        uploader.upload();
    } else if ( state === 'paused' ) {
        uploader.upload();
    } else if ( state === 'uploading' ) {
        uploader.stop();
    }
});

$info.on( 'click', '.retry', function() {
    uploader.retry();
} );

$upload.addClass( 'state-' + state );
updateTotalProgress();